The games I remember having the most fun with in my life in random order:
The World Ends With You
Kid Icarus: Uprising
Mario & Luigi: Superstar Saga
Pokémon Black 2
Advance Wars 2: Black Hole Rising
Danganronpa 2: Goodbye Despair
Zoo Tycoon
The Sims 2
Fable: The Lost Chapters
TWEWY is definitely my most favorite game, though. I should replay that game one day.
Tagging users after an edit doesn't work, you know.
And happy anniversary! For us Europeans it was originally supposed to release 9/11...
But anyway, I like missions where you are in a hopeless situation and have a gigantic army coming at you, like The Final Battle or Lab Rats. And Sea Fortress is also great because it's so unique. And I like how it's vertical in AC instead of horizontal.
My favorite COs are the AW1-2 COs from Green Earth + Sami. Kind of a shame they didn't put her with GE in Dual Strike so they would've been the true specialism faction, Eagle for air, Drake for navy, Jess for vehicles and Sami for infantry. From DoR, it's Brenner because of plot reasons. Honorable mention to Sensei.